>Because the Form.DataEnvironment is it's own collection.

So it's not an object then, but it's not an array either, it's a...collection :). Why does AMEMBERS(aArrayName, 2) which according to help:

"Specifies that the array contains the names of the objects that are members of the object specified with ObjectName. The resulting array is one-dimensional."

include the DE in the array?, I mean, no big deal, there are workarounds, but the terminology is confusing.